class_docstr: This is required to make bitarray hashable with Py3
  (see http://bit.ly/1NIuA9F for explanation)
code: def __hash__(self):
      return id(self)
  
file_path: NearPy/nearpy/hashes/permutation/permutedIndex.py
imports: import logging
  from bitarray import bitarray
  from nearpy.hashes.permutation.permute import Permute
label_desc: Use image node_id 1 for calling the bitarray obj's underlying member method code with example usage: obj.__hash__() and returns: id